江西建材Issue(10)：268-270,3.
软土地区拔桩施工对既有地下燃气管线影响的数值模拟分析
Numerical Simulation Analysis on the Influence of Pile Pulling Construction on Existing Underground Gas Pipelines in Soft Soil Areas
赵华 1杨新应 2路培波 1蒋阳阳3
作者信息
- 1. 中铁十六局集团第三工程有限公司,浙江 湖州 313000
- 2. 宁波市轨道交通集团有限公司地产开发分公司,浙江 宁波 315000
- 3. 宁波市轨道交通集团有限公司建设分公司,浙江 宁波 315000
- 折叠
摘要
Abstract
In recent years,with the construction of rail transit,there has been an increasing number of projects to remove abandoned bridge pile foundations in shield tunneling sections,and the removal of old piles during construction can have a significant deformation impact on the surrounding environment.Therefore,it is necessary to effectively control and protect the pipelines within the affected area during pile pulling construction.The research object of this article is the proximity of underground gas pipelines during pile pulling construction.Based on the demolition and reconstruction of the pile foundation for the 2nd staircase of the Wantou Bridge in the civil engineering project of Ningbo Metro Line 7 TJ7022 section,a three-dimensional finite element model of the impact of steel sleeve pile pulling construction on urban underground pipelines in soft soil areas is established using the finite element software MIDAS GTS NX.The calculation results indicate that the impact of pile foundation extraction construction on adjacent underground gas pipelines is mainly manifested as vertical settlement.After excavating and replacing the soil above the pipeline with fine sand,the settlement and deformation of the pipeline in each construction step have decreased,with a maximum vertical settlement reduction of about 19%compared to the non replacement condition,and the effect of reducing deformation is more obvious.The calculation results can provide reference significance for the protection of adjacent pipelines during pile pulling construc-tion in soft soil areas.关键词
软土/拔桩/数值分析/地下管线Key words
Soft soil/Pulling out piles/Numerical analysis/Underground pipelines分类
建筑与水利引用本文复制引用
赵华,杨新应,路培波,蒋阳阳..软土地区拔桩施工对既有地下燃气管线影响的数值模拟分析[J].江西建材,2024,(10):268-270,3.
